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Composition of Lipids of Cereal Forages as Related to Tetany in Cattle

Bohman, V.R. and Mayland, H.F. and Grunes, D.L. (1985) Composition of Lipids of Cereal Forages as Related to Tetany in Cattle. Proceedings, Western Section American Society of Animal Science. 36:468-471.

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Abstract

Forage samples were collected from mixed winter wheat and rye (Triticum aestivum L. and Secale cereale L.) pastures, from December through April at El Reno, Oklahoma, while they were grazed by 32 mature cows to determine if the concentrations and speciation of naturally occurring higher fatty acids (HFA) in forage were related to the incidence of tetany. Forage samples were analyzed for N, K, aconitic acid, total lipids and total and individual Cll to C18:3 HFA. Total HFA and lipid values were high in the very immature forage, but these values decreased as the winter season progressed. In early March, these values increased sharply coinciding with rapid forage growth and were near maximum on the day (19 March) when tetany occurred in five cows. Forage N concentrations were also maximum on that day and then declined rapidly with time. A positive correlation (P<.05),occurred between forage N, total lipids, HFA, K, aconitic acid, and C18:3. A negative correlation (P<.05) occurred between total lipids and C18:2 and C16; HFA and C18:2, and between C18:3 and C18:2 and C16. Aconitic acid and K were also negatively correlated with C16 and C18:2. Linolenic (C18:3) was the predominant fatty acid (62 percent), followed by palmitic (C16 at 15 percent) and linoleic (C18:2 at 10 percent). Other fatty acids (C12, 14, 16:1, 18 and 18:1) constituted the remaining 13 percent. The fatty acid composition was similar to that reported in other gramineae forages. It was concluded that the naturally occurring HFA could be a factor in tetany of grazing animals.

Item Type: Article
NWISRL Publication Number: 0550
Additional Information: Exact duplicate of NWISRL publication 620
Subjects: Animal > Animal health
Irrigated crops > Grass forage > Chemistry
Irrigated crops > Small grain
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:52
Last Modified: 13 Jan 2017 21:50
Item ID: 437
URI: https://eprints.nwisrl.ars.usda.gov/id/eprint/437

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